Question

find the measures of the following angles in the rectangle.
label optional
m∠1 =

Explanation:

Step1: Use straight angle property

A straight angle is $180^\circ$. So $m\angle1 + 37^\circ = 180^\circ$.

Step2: Calculate $m\angle1$

$m\angle1 = 180^\circ - 37^\circ = 143^\circ$.

Answer:

143°